Why were the americans first attacked in world war ii

Hi, Ive been on this topic recently hope this helps:

Germany and Italy declared war on the United States three days later. The first planned offensive action by the United States in World War II came in January 1942 when the aircraft carrier USS Enterprise attacked Japanese bases in the Marshall Islands. As a result, On 11 December 1941, four days after the Japanese attack on Pearl Harbor and the United States declaration of war against the Japanese Empire, Nazi Germany declared war against the United States, in response to what was claimed to be a series of provocations by the United States government when the US was still ...

b.   jim crow laws were enacted in northern states.

i think the answer is a and i hope this ; ))